CN102670187B - Biometric apparatus - Google Patents

Abstract

The relational expression of energy consumption for a given pulse rate of the measurement object is obtained through simple measurement without applying an excessive load to the measurement object. It is characterized in that it includes: an indication unit, which indicates the implementation of a given state to the measurement object; a pulse sensor, which measures the pulse rate of the given state; an energy consumption measuring unit, which measures the given state The energy consumption of the body information calculation unit, the body information calculation unit determines the consumption of the given pulse rate of the measurement object based on the pulse rate measured by the pulse sensor in a given state and the energy consumption measured by the energy consumption measurement unit at the pulse rate. A relational expression of energy, and the biological information of the measurement object is calculated based on the relational expression.

Description

Body Measuring Device

technical field

The present invention relates to a body measuring device.

Background technique

Conventionally, when judging the physical strength of a measurement subject, stamina is usually used as a reference. Generally, the larger the VO ₂ max (VO _{2 max} ) (maximum oxygen uptake per unit time), the better the evaluation. Therefore, it is important to accurately measure VO ₂ max when judging the physical strength of a measurement subject.

Patent Document 1: JP-A-2006-238970

Contents of the invention

However, in order to accurately measure VO ₂ max , a large load may be applied to the measurement object. That is, it is necessary to apply an exercise load that is extremely close to the limit, that is, the heart rate reaches the maximum heart rate. In this exercise, since VO ₂ (oxygen uptake) needs to be measured and used as VO ₂ max, give the test object bring a great burden. In addition, since such a measurement requires large-scale equipment and equipment, the measurement cannot be performed without going to a specific place where the equipment and equipment are installed, which is inconvenient.

On the other hand, VO ₂ at the maximum heart rate (ie, VO ₂ ( _HRmax )) can be close to VO ₂ max. In addition, while VO ₂ has a high correlation with energy consumption, VO ₂ (HRmax) also has a high correlation with energy consumption (EE (75% HRmax)) at a heart rate of 75% of the maximum heart rate. The inventors of the present invention focused on this point and developed a living body measurement device that can determine the relational expression of energy consumption for a given pulse rate of a measurement subject through simple measurement. In addition, the heart rate and the pulse rate are basically synonymous terms, but in the following description, the heart rate means the beating rate of the heart, and the pulse rate means the pulse rate of the peripheral organs.

An object of the present invention is to provide a living body measurement device capable of obtaining a relational expression of energy consumption for a given pulse rate of a measurement subject without applying an excessive load to the measurement subject through simple measurement.

In order to solve the above-mentioned problems, the living body measurement device of the present invention is characterized in that it includes: an instruction unit that instructs the measurement object to implement a given state; a pulse sensor that measures the pulse rate of the given state; an energy measuring unit, the consumed energy measuring unit measures the consumed energy in the given state; a body information calculating unit, based on the pulse rate measured by the pulse sensor and the pulse rate in the given state, When the energy consumption measured by the energy consumption measuring unit determines a relational expression of energy consumption for a given pulse rate of the measurement subject, the biological information of the measurement subject is calculated based on the relational expression.

In addition, the indication unit of the living body measuring device of the present invention at least sequentially indicates at least the first state which is the given state, the second state which is an active state with a greater load than the first state, and the second state which is an active state with a load greater than the second state. In the implementation of the third state of the large activity state, the biological information calculation unit is based on the pulse rate and energy consumption of the measurement subject in the first state, and the pulse rate and energy consumption of the measurement target in the second state. The three-point approximate straight line of energy, the pulse rate of the measurement subject in the third state, and consumed energy is used to determine the relational expression.

Furthermore, in the living body measurement device of the present invention, when the difference between the pulse rate of the measurement subject in the first state and the pulse rate of the measurement subject in the second state is equal to or less than a predetermined threshold value, An activity state with a greater load than an activity state indicated when the difference is greater than the given threshold is taken as the third state indication.

In addition, the living body measurement device of the present invention further includes a data input unit capable of inputting the age, sex, body weight, and fat-free body mass of the measurement subject, and the energy consumption measurement unit has an acceleration unit capable of detecting the acceleration value of the body movement of the measurement subject. The sensor is used to calculate the energy consumption according to the acceleration value of the body movement detected by the acceleration sensor and the age, gender, body weight, and fat-free body weight input by the data input unit.

In addition, in the living body measuring device of the present invention, when the fat-free body mass input by the data input means is larger than a predetermined reference value, it is compared with when the fat-free body mass is equal to or less than the predetermined reference value. An active state with a greater load than the indicated active state is used as the second state and/or the third state indication.

In addition, when the living body measurement device of the present invention detects that the change in the pulse rate of the measurement subject in the given state is within a predetermined range during the execution time of continuing the implementation of the given state, the indication unit Before the implementation time elapses, the implementation of the given state is indicated to be completed, and if not detected, the instructing unit indicates the end of the implementation of the given state after the implementation time has elapsed.

In addition, the instruction unit of the biological measurement device of the present invention instructs the implementation of an activity state of the same content as the given state for a given time, and the biological information calculation unit is based on the information measured during the given time. A plurality of pulse rates and energy consumption of the measurement subject in the given state are obtained to obtain an approximate straight line and determine the relational expression.

In addition, the biological information calculation unit of the biological measurement device of the present invention calculates EE (75% HRmax) of the measurement object based on the relational expression with respect to the biological information, and applies the EE (75% HRmax) to VO ₂ (HRmax) of the measurement subject was calculated into an expression representing the correlation between EE (75% HRmax) and VO ₂ (HRmax). In addition, EE (75% HRmax) means the energy consumption at the heart rate (pulse rate) of 75% of the maximum heart rate (pulse rate), and VO ₂ (HRmax) means VO ₂ at the maximum heart rate (pulse rate) . Also, VO ₂ means oxygen uptake.

In addition, the biological information calculation unit of the living body measurement device of the present invention performs physical strength determination on the measurement subject based on the VO ₂ (HRmax) value of the measurement subject and the sex and age of the measurement subject, and The display part displays the judgment result.

Furthermore, the living body information calculation unit of the living body measuring device of the present invention applies the pulse rate of the measurement object acquired by the pulse sensor to the relational expression as the living body information, and calculates the pulse rate corresponding to the pulse rate. consume energy.

According to the present invention, the relational expression of energy consumption for a given pulse rate of the measurement object can be obtained by simple measurement without applying an excessive load to the measurement object. According to this relational expression, VO ₂ (HRmax), which can be used as an indicator of physical strength, can be calculated by calculating the energy consumption (EE (75% HRmax)) at 75% of the maximum heart rate (pulse rate). ), therefore, it is possible to measure the physical strength without applying a large load to the measurement object.

In addition, since it is a structure that enables miniaturization of the device, large-scale machinery and equipment are not required, so simple measurement can be performed. The relational expression of energy consumption for a given pulse rate determined by the present invention is determined based on data unique to each measurement object, so a highly accurate relational expression can be obtained.

According to the above relational expression, only by measuring the pulse rate of the measurement subject, the energy consumption in the state of the pulse rate can be calculated. Therefore, even in the method of calculating the acceleration value of the body movement and calculating the energy consumption by using the acceleration sensor as in the past, under the activity state (for example, running a bicycle, climbing a mountain, etc.) that cannot be accurately calculated, by measuring the acceleration value at this time The pulse rate can also correctly calculate the energy consumption. In addition, since the pulse sensor and the energy consumption calculation unit (acceleration sensor) are combined, when performing pulse measurement with the pulse sensor, energy consumption can be obtained from the pulse rate as described above. , the energy consumption can be obtained from the acceleration value of the body movement as in the past.

Description of drawings

FIG. 1 is a block diagram showing the configuration of a living body measuring device of the present invention.

FIG. 2 is a program flowchart showing the flow of physical strength measurement according to the first embodiment of the present invention.

Fig. 3 is a graph showing the relationship between pulse rate and energy consumption.

Fig. 4 is a graph showing the relationship between pulse rate and energy consumption.

Fig. 5 is a graph showing the relationship between pulse rate and energy consumption.

FIG. 6 is a program flowchart showing the flow of physical strength measurement according to the second embodiment of the present invention.

FIG. 7 is a program flowchart showing the flow of physical strength measurement according to the third embodiment of the present invention.

Fig. 8 is a graph showing the relationship between pulse rate and energy consumption.

Label description

10-body measuring device; 21-operation unit; 22-display unit; 23-power supply unit; 31-acceleration sensor; 31a-X-axis sensor; 31b-Y-axis sensor; 31c-Z-axis sensor; 32-calculation unit; 33 -storage unit; 34-timing unit; 35-A/D converter; 40-control unit; 50-pulse sensor; 51-LED; 52-photodiode.

Detailed ways

Hereinafter, a living body measurement device according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a living body measurement device 10 . As shown in FIG. 1 , the living body measurement device 10 includes an operation unit 21, a display unit 22, a power supply unit 23, an acceleration sensor 31, a calculation unit 32, a storage unit 33, a timer unit 34, an A/D converter 35, a control unit 40 and Pulse sensor 50. The detailed structure of each part will be described below.

The operation unit 21 is mainly used as a data input means for inputting biological information of a measurement object or inputting setting items of the biological measurement device 10 . The number, shape, and operation method of the operation unit 21 are not particularly limited, and a button type, a touch sensor type, a dial type, etc. may be appropriately adopted. As the biological information input from the operation unit 21, age, sex, weight, height, and fat-free body weight can be cited as an example. However, as described later, it is the calculation of energy consumption based on the activity of the measurement object or the measurement of physical strength. The necessary body information is not particularly limited. Note that the setting items are the setting items on the body measuring device 10 used by the measurement target, for example, the initial setting of the body measuring device 10 , the current date and time, and switching of the display content of the display unit 22 . The machine body information and setting items thus input are stored in the storage unit 33 under the control of the control unit 40 and displayed on the display unit 22 .

The display unit 22 is a display unit for displaying the data transmitted from the control unit 40, and mainly performs display of body information and setting items of the measurement target, display of operation guidance, display of execution instructions of a given state, current time, date and time. Display of the day of the week, the measured pulse rate, the calculated energy consumption, and the physical strength judgment result. The display content is stored in the storage unit 33 , and the control unit 40 reads data from the storage unit 33 and displays it on the display unit 22 according to the program stored in the storage unit 33 and according to the usage status of the biological measurement device 10 . The display unit 22 may be a display using, for example, a liquid crystal or an organic EL element, or the display unit 22 and the operation unit 21 may be integrally formed as a liquid crystal display panel having a touch panel function.

The power supply unit 23 is a power supply member constituted by a power supply source such as a battery, and supplies power to each component of the living body measurement device 10 via the control unit 40 .

The storage unit 33 is, for example, a storage unit constituted by a nonvolatile memory using a semiconductor element. Combination of volatile memory and nonvolatile memory is also possible. The volatile memory can temporarily store various data used for processing by the control unit 40 , and is used, for example, as a temporary storage area during calculation processing by the calculation unit 32 . Non-volatile memory is used to store data that should be stored for a long time, for example, storage of body information (age, sex, height, etc.) Storage of relational expression of energy (described later), storage of expression (described later) indicating the correlation between EE (75% HRmax) and _VO2 (HRmax), storage of judgment table (described later), storage of various programs storage etc.

The timer unit 34 is a member that measures the elapse of time (for example, implementation time of a predetermined state, predetermined time to be described later). In this embodiment, the timer unit 34 is an independent component, but it may be integrated with the control unit 40 as a timer circuit, and the control unit 40 itself judges whether a predetermined time has elapsed.

The acceleration sensor 31 changes the output value according to the acceleration value caused by the body motion of the measurement subject of the body measurement device 10 worn on the body, and is one of the components of the energy consumption measurement unit. More specifically, the acceleration sensor 31 has an X-axis sensor 31a, a Y-axis sensor 31b, and a Z-axis sensor 31c (see FIG. 1 ), and can detect directions of three axes (X-axis, Y-axis, and Z-axis) orthogonal to each other. body movement, the value obtained by combining the output values of the x-axis sensor 31a, the y-axis sensor 31b, and the z-axis sensor 31c can be obtained as an acceleration value.

The output obtained by the acceleration sensor 31 is subjected to analog-to-digital conversion by the A/D converter 35 for processing by the control unit 40 or the calculation unit 32 . More specifically, each output value obtained as analog data from the x-axis sensor 31a, the Y-axis sensor 31b, and the Z-axis sensor 31c is output by the A/D converter 35a, the A/D converter 35b, and the A/D converter 35a, respectively. 35c is converted into digital data. The converted data can be associated with the timer unit 34 and stored in the storage unit 33 as body motion information in association with the elapsed time from the start of acquisition.

In addition, the A/D converted value of each output value of the X-axis sensor 31 a , the Y-axis sensor 31 b , and the Z-axis sensor 31 c is synthesized by the calculation unit 32 . Accordingly, an acceleration value (A/D conversion value of the acceleration value) is calculated as digital data, associated with the timer unit 34 and associated with the elapsed time from the start, and stored in the storage unit 33 as body motion information. The acceleration value may also be stored as an accumulated value (magnitude of the acceleration value) of the acceleration value at a given time. If the acceleration value is obtained corresponding to the elapsed time, by observing the acceleration value sequentially in the order of acquisition, not only the intensity of the body movement, but also the repetition and continuity of the body movement, the interval when the same body movement is repeated or The number of times (for example, the number of steps (number of steps)) is acquired as body motion information.

In addition, in order to more accurately obtain acceleration values (body motion information) based on all body movements of the measurement subject by the acceleration sensor 31, the living body measurement device 10 is preferably attached to the measurement subject in close contact with the measurement subject's body. The acceleration values obtained in this way are stored in the storage unit 33 under the control of the control unit 40 , and a part (for example, the number of steps) is displayed on the display unit 22 .

Pulse sensor 50 includes LED 51 (Light Emitting Diode) and photodiode 52 . The LED 51 irradiates a predetermined portion of the measurement object with light of a wavelength suitable for pulse measurement, for example, blue light. The light emitted from the LED 51 is absorbed by hemoglobin in the blood vessel to be measured, reflected by the subcutaneous tissue, etc., and received by the photodiode 52 . The photodiode 52 performs photoelectric conversion of the incident light, and outputs an electrical signal corresponding to the incident light. This electrical signal corresponds to a change in the amount of hemoglobin in the blood vessel of the measurement subject. Therefore, the pulse rate can be known from the output signal of the photodiode 52, and the pulse rate per unit time can be calculated by combining the measurement results of the calculation unit 32 and the timer unit 34. Pulse sensor 50 is suitably attached to, for example, the earlobe or fingertip of the measurement subject.

In addition, the measurement of the pulse may combine light-emitting members other than LEDs and light-receiving members other than light-emitting diodes. In addition to optical measurement methods, for example, pressure measurement methods can also be used. In addition, the heart rate of the measurement subject is measured by a heart rate meter that directly obtains the heart beat rate on the chest, and the same processing as that described later is performed on the pulse obtained by the pulse meter.

As shown in Figure 1, the control unit 40 is electrically connected to the operation unit 21, the display unit 22, the power supply unit 23, the acceleration sensor 31, the calculation unit 32, the storage unit 33, the timing unit 34, the A/D converter 35 and the pulse sensor 50. , the actions of each component are controlled by the control unit 40 . In addition, it is preferable that the calculating part 32 and the control part 40 are respectively comprised by the integrated circuit.

In addition, the control unit 40 is used as an instructing unit that instructs the implementation of a predetermined state for the measurement object. This instruction is performed by causing the display unit 22 to display the content of a predetermined state. The content for displaying a given state on the display unit 22 mainly includes the type of activity and the intensity of activity. Examples of the type of activity include walking, running, quiet, and stillness, and examples of the intensity of the activity include slow walking, brisk walking, and jogging. In addition, as a display of the activity intensity, for example, during walking, an image that changes regularly according to the rhythm may be displayed on the display unit 22 .

The calculation unit 32 (calculation means) is under the control of the control unit 40 based on the body information (such as age, gender, body weight, fat-free body weight) and body motion information (acceleration value) input based on the measurement object stored in the storage unit 33 , to calculate the energy consumption based on the body movement of the measurement subject. The energy consumption of the body movement information per given unit time (for example, 20 seconds) is cumulatively summed up to calculate the energy consumption. In the present embodiment, the consumed energy measurement unit is mainly composed of an acceleration sensor 31 , an A/D converter 35 , and a calculation unit 32 .

In addition, the calculation unit 32 is used as a biological information calculation unit. The calculating unit 32 can determine the relationship between the pulse and the consumed energy, that is, the relational expression of the consumed energy for a given pulse rate, based on the measurement by the pulse sensor 50 and the measurement by the consumed energy measuring unit. By specifying the relational expression of the consumed energy for a given pulse rate, the biological information described as the following embodiments can be calculated from the relational expression.

The living body measurement device 10 is particularly suitable to be configured as a compact device. For example, the main body case (not shown) is configured in a size that can be accommodated in the breast pocket. The power supply unit 23, the acceleration sensor 31, the calculation unit 32, the storage unit 33, the timing unit 34, the A/D converter 35, and the control unit 40 are arranged inside the main housing, and the operation unit 21 and the display unit are arranged on the outer surface of the main housing. twenty two. The pulse sensor 50 can be unwound and rewound by a rope reel provided inside the main body housing. With such a structure, it is easy to carry and convenient, and simple measurement can be performed.

first embodiment

Next, a first embodiment of the living body measuring device 10 will be described with reference to FIG. 2 . The calculation unit 32 can determine the physical strength of the measurement object. In the present invention physical strength is stamina. Generally, the greater the _VO2max , the better the stamina evaluation, but in the present invention, in order to reduce the burden on the measurement subject, the _VO2 at the time of the maximum heart rate (pulse rate) close to _VO2max (that is, _VO2 (HRmax )) as the basis for physical strength determination. While VO ₂ has a high correlation with energy expenditure, VO ₂ (HRmax) also has a high correlation with energy expenditure (EE (75% HRmax)) at 75% of the maximum heart rate (pulse rate) Correlation. EE (75% HRmax) can be estimated from the energy expenditure and heart rate (pulse rate) at the time of given activity. That is, the determination of physical strength in the present invention can be judged and evaluated by measuring the pulse rate in a given state and the energy consumption in a given state, estimating EE (75% HRmax), and further obtaining _VO2 (HRmax).

In the example shown in FIG. 2 , the implementation of specifying three given states (the first state, the second state, and the third state) to the measurement object measures physical strength based on the pulse rate and energy consumption of each given state, but according to The required measurement accuracy and the like indicate that the number of given states to be implemented may be two or four or more.

The pulse sensor 50 is attached to a predetermined position (for example, the earlobe) of the measurement subject, and the pulse measurement is started (step S100). The pulse measurement is started when a predetermined operation is performed on the operation unit 21 (by pressing a start button, etc.) by the measurement subject. The control unit 40 causes the pulse sensor 50 to start pulse measurement, and also causes the timer unit 34 to start measuring the elapsed time. The pulse measurement is continued during the implementation of the given state (until step S114).

Next, the control unit 40 instructs the measurement subject to perform "slow walking" as the first state, and the measurement subject performs slow walking (step S101). For example, the content of the instruction is displayed on the display unit 22, or an instruction is given by a voice instruction from an unillustrated sound generator (the same applies hereinafter). The control unit 40 causes the calculation unit 32 to calculate and store the consumed energy in the storage unit 33 at regular intervals (for example, 20 seconds) according to the detection result by the acceleration sensor 31 when the measurement subject is walking.

The control unit 40 judges whether or not a predetermined implementation time has elapsed from the start of walking (first state) (step S102). This implementation time may be, for example, 4 minutes, but it is not particularly limited, and another time may be appropriately set. When a given implementation time has passed from the start of walking (the first state) (Yes in step S102), the control unit 40 instructs the implementation of the first state to end, and instructs the measurement object as the second state of "increasing the walking speed". walk" (step S104). That is, the second state is an active state with a higher load than the first state.

If the given implementation time has not elapsed from the start of walking (first state) (NO in step S102), the control section 40 judges whether it is a stable detection state (step S103). Whether the judgment of whether it is a stable detection state can be judged within the implementation time of continuing to implement the first state and whether it is detected that the change of the pulse number of the measurement object in the first state is within a given range. As an example, it can be determined by judging almost the same pulse Whether to continue for 20 down to judge, you can also use other conditions to judge.

When the control unit 40 determines that the detection state is stable (YES in step S103 ), it instructs the end of the first state before a predetermined implementation time elapses, and proceeds to step S104 . If it is judged not to be in the stable detection state (No in step S103), the control unit 40 makes the measurement subject continue in the present first state (walking slowly) (step S101), and repeats the processing of steps S102 to S103 in the same manner as above.

If it becomes a stable detection state before a given implementation time (4 minutes in the example) has elapsed from the start of walking (the first state), then the first state is ended and the instruction transitions to the second state, and the indication can be realized The time to perform the first state is shortened, and the burden on the measurement object can be reduced.

If the control unit 40 instructs the measurement object to increase the walking speed (second state) of the walking speed (step S104), the measurement object performs the walking (step S104) of increasing the walking speed compared with the walking of the first state (referring to step S101) according to the instruction. S105). During this walking, the control unit 40 causes the calculation unit 32 to calculate and store the consumed energy in the storage unit 33 at regular intervals according to the detection result by the acceleration sensor 31 when the measurement subject is walking.

The control unit 40 judges whether or not a predetermined implementation time has elapsed since the start of walking (second state) to increase the walking speed (see step S105 ) (step S106 ). This implementation time may be the same as S102, for example, 4 minutes, or may be set to other time.

When a predetermined implementation time has elapsed from the start of walking (the second state) to increase the walking speed (YES in step S106), the process proceeds to step S108. On the other hand, when the predetermined execution time has not elapsed since the start of the walking (second state) at increased walking speed (NO in step S106), the control unit 40 determines whether it is a stable detection state (step S107). The determination of the stable detection state is the same as step S103, and it may be determined whether the change in the pulse rate of the measuring object detected in the second state is within a given range during the implementation time of the second state.

When it is determined that the detection state is stable (YES in step S107), the control unit 40 instructs the end of the second state before the predetermined implementation time elapses, and proceeds to step S108. And when judging that it is not a stable detection state (no in step S107), the control unit 40 makes the measurement object continue to the present second state (walking with increased walking speed) (step S105), and repeats step S106 to step S106 similarly to the above. Processing of S107.

In step S108, the control unit 40 determines whether the difference between the pulse rate in the first state (step S101) and the pulse rate in the second state (step S105) is equal to or less than a predetermined number of times (a predetermined threshold). The predetermined number of times may be set to 9 times, but other pulse numbers may also be used.

When the pulse difference is greater than the predetermined number of times (NO in step S108), the control unit 40 instructs the measurement subject to "walk with further increased walking speed" as the third state (step S109). On the other hand, in step S108, when the pulse difference is equal to or less than a predetermined number of times (YES in step S108), the control unit 40 instructs the measurement object to be "running" as the third state (step S110). When the difference between the pulse rate of the measurement subject in the first state and the pulse rate of the measurement subject in the second state is below a given threshold value, the load is more severe than the activity state indicated when the difference is larger than the given threshold value. A large active state is indicated as the third state. In addition, the third state is an active state with a higher load than the second state.

As described above, based on the difference between the pulse rate in the first state and the pulse rate in the second state, "walking at a further increased speed" (step S109) and "running" (step S110) are respectively used as the third state. That is, because the measurement subject has physical strength, when the pulse rate in the first state and the second state hardly differs, "running" is indicated as the third state, and the pulse difference between the first state and the second state is larger than a given number of times The measurement object of , indicates "walking at a further increased speed" as the third state. Using the two third states according to the physical strength of the measurement object in this way does not impose an excessive burden on the measurement object. In addition, it is possible to generate an approximate straight line described later with higher accuracy, thereby accurately measuring the physical strength.

Next, the measurement subject walks or runs at an increased speed according to the instruction of the third state in step S109 or step S110 (step S111 ). The control unit 40 causes the calculation unit 32 to calculate and store the consumed energy in the storage unit 33 at predetermined time intervals according to the detection result by the acceleration sensor 31 when the measurement subject is walking or running.

The control unit 40 judges whether or not a predetermined execution time has elapsed since the start of walking or running at an increased speed (third state) (step S112 ). The implementation time may be the same as step S102 and step S106, for example, 4 minutes, or may be set to other time. When a predetermined execution time elapses from the start of walking or running at an increased speed (third state) (Yes in step S112), the control unit 40 instructs the end of the execution of the third state, and ends the pulse measurement (step S114).

When the predetermined execution time has not elapsed since the start of walking or running at an increased speed (third state) (NO in step S112), the control unit 40 determines whether it is a stable detection state (step S113). The determination of the stable detection state may be the same as step S103 and step S107, and it may be determined whether the change of the pulse rate of the measurement object detected in the third state is within a given range during the implementation time of the third state.

When the control unit 40 determines that the detection state is stable (YES in step S113 ), it instructs the completion of the implementation of the third state before the predetermined implementation time elapses, and ends the pulse measurement (step S114 ). On the other hand, when it is determined that the detection state is not stable (NO in step S113), the control unit 40 keeps the measurement object in the current third state (step S111), and performs the processing from step S112 to step S113 in the same manner as above.

After the pulse measurement is completed (step S114), the control unit 40 generates an approximate straight line based on the pulse rate and energy consumption respectively acquired in the above-mentioned first state, second state, and third state (step S115). The generation of the approximate straight line corresponds to determination from the relational expression between the measured pulse rate and the consumed energy.

There is a high correlation between the energy consumption and the pulse rate, so in step S115, an approximate straight line representing their relationship is generated. In this embodiment, as described above, the pulse rate and energy consumption of a total of 3 points in the first state, the second state, and the third state are measured. 3 points can be depicted in the chart representation. Therefore, an approximate straight line can be generated using the least square method from these 3 points.

3 to 5 are graphs depicting the pulse rate and energy consumption in the first, second and third states, and showing their relationship. FIG. 3 shows each point when the three points corresponding to the first, second, and third states are moderately discrete, and an approximate straight line L11 generated based on these three points.

Here, the meaning of step S108 to step S110 in FIG. 2 will be described with reference to FIG. 4 and FIG. 5 . FIG. 4 shows an approximate straight line L12 drawn when the difference in pulse rate is small in the first, second, and third states. For example, in the case of a measurement subject whose physical strength is high and the pulse rate is difficult to rise no matter how much exercise is done, the difference between the pulse rate in the first state and the pulse rate in the second state does not change so much. In view of this, assuming that "walking with increased walking speed" is instructed as the third state (refer to step S109 in FIG. 2 ), the pulse rate in the third state does not change much as well. Therefore, even if the approximate straight line L12 (refer to FIG. 4 ) is obtained based on the pulses and the consumed energy in the first to third states obtained in this way, the possibility of the approximate straight line including a large error increases. At this time, it also affects the estimation of EE (75%HRmax) to be performed later.

Therefore, as in step S108 of FIG. 2 , the difference between the pulse rate during the first state and the second state is small (Yes in step S108 of FIG. 2 ), indicating that the third state is heavier than the load such as "running". A large activity (step S110 in FIG. 2 ) causes a large change in the pulse rate. 5 shows an approximate straight line L13 drawn when the difference in pulse rate between the first and second states is small, but indicates running as the third state, and the difference in pulse rate between the second state and the third state becomes large. As shown in FIG. 5 , a point corresponding to the third state is discrete from 2 points corresponding to the first and second states. Accordingly, an approximate straight line with a small error can be generated.

After generating the approximate straight line (step S115), the control unit 40 determines whether any pulse rate in the first, second and third states has risen to 75% of the maximum heart rate (pulse rate) (step S116). Here, the maximum heart rate (pulse rate) can be calculated as "220-the age of the measurement subject".

When any of the pulse rates in the first, second and third states rises to 75% of the maximum heart rate (pulse rate) (Yes in step S116), the control unit 40 increases to the maximum heart rate (pulse rate) VO ₂ (HRmax) is estimated from the measured energy consumption (EE(75%HRmax)) at 75% of the time (step S117). In addition, step S116 and step S117 are in order to obtain the energy consumption (EE (75%HRmax)) when the maximum heart rate (pulse rate) rises to 75%, using such actual measured values, the more accurate determination of physical strength becomes possible steps. In order to simplify the process, step S116 and step S117 may not be provided, and step S118 may be used to estimate VO ₂ (HRmax) from the approximate straight line. In addition, step S115 of generating an approximate straight line may not be performed before step S116, and may be performed only when it is judged No in step S116.

When any of the pulse rates in the first, second, and third states has not risen to 75% of the maximum heart rate (pulse rate) (No in step S116), the control unit 40 , estimate the energy consumption (EE(75%HRmax)) at 75% of the maximum heart rate (pulse rate), and estimate VO ₂ (HRmax) from the energy consumption (EE(75%HRmax)) ( Step S118). In the example shown in FIG. 3 , the measurement subject is 30 years old, and the heart rate (pulse rate) of 75% of the maximum heart rate (pulse rate) becomes 142.5 bpm (see the dashed-dotted line in the figure). The control unit 40 estimates (calculates) VO ₂ (HRmax) from the energy consumption (EE (75% HRmax)) at a pulse rate of 142.5 bpm (step S118 ).

According to a predetermined regression formula (an expression representing the correlation between EE (75% HRmax) and VO ₂ (HRmax)), the EE (75% HRmax)-based VO ₂ (HRmax) analysis performed in steps S117 and S118 is performed. ) guess (calculation). As described above, VO ₂ (HRmax) has a high correlation with energy expenditure (EE (75% HRmax)) at a heart rate (pulse rate) of 75% of the maximum heart rate (pulse rate). Therefore, this regression formula can be set as an expression showing the correlation between EE (75% HRmax) and VO ₂ (HRmax). For example, unspecified multiple examinees are used as objects in advance, and the relevant sampling data of VO ₂ (HRmax) when collecting EE (75% HRmax) are collected at EE (75% HRmax) (EE (75%HRmax) )/kg) on the vertical axis, and the oxygen uptake (VO ₂ (HRmax)/kg) per 1 kg of body weight at the time of the maximum heart rate (pulse rate) is plotted on a graph on the horizontal axis, and an approximate curve can be obtained by plotting these data Set up the regression formula.

The control unit 40 estimates the physical strength of the measurement subject from the VO ₂ (HRmax) estimated (calculated) in step S117 or step S118 (step S119 ). The content of the determination of physical strength can be appropriately set, but as an example, a determination table for different age groups related to VO ₂ (HRmax) can be set for men and women, and the VO ₂ (HRmax) calculated as described above can be used in the determination table. HRmax) for judgment. The judgment table is divided into "below 19 years old", "20-24 years old", "25-29 years old", ... "65-69 years old", "over 70 years old" etc. according to age groups, and each age group The average value of VO ₂ (HRmax) is used as the center, and VO ₂ (HRmax) is divided at given numerical intervals, and 5 stages are set, such as "very little", "little", "average", "good", and "very good". content of the judgment. The result of determination in step S119 is displayed on the display unit 22 .

According to the above structure, according to the embodiment, the following effects can be produced.

(1) The physical strength can be judged only by performing arbitrary walking or running, so it is not necessary to perform intense exercise for a long time, so the physical strength can be judged without applying a large load to the measurement object.

(2) Since the physical strength is judged using the consumed energy based on the detection result from the acceleration sensor, it is not necessary to use a large-scale machine, and it can be judged in daily life.

(3) The relational expression of energy consumption for a given pulse rate determined by the present invention is determined based on data unique to each measurement object, so it becomes possible to determine physical strength with high accuracy.

(4) Measurements of a plurality of activity states can be easily and individually performed in a short time.

(5) It is possible to perform light exercises such as quietness and walking according to the instructions of the device. Even if the exercise time is not measured, the assistant who instructs the exercise rhythm can measure it.

Modification of the first embodiment

The living body measurement device 10 has an operation unit 21 as data input means capable of inputting the age, body weight, and fat-free body mass of a measurement subject. The fat-free body mass input from the operation unit 21 has a strong relationship with the muscle mass, and a high fat-free body mass can be said to have a high muscle mass. Therefore, in the first embodiment, the control unit 40 as the instructing unit compares the activity state indicated when the fat-free body mass is below the given reference value when the input fat-free body mass is larger than the given reference value. An active state with a greater load than , is indicated as the second state and/or the third state. With such a configuration, for a measurement object with a high fat-free body mass (or muscle mass), as the second state and/or the third state, an active state with a higher load is indicated, and the pulse rate can be increased in a moderate range, and the accuracy can be improved. The approximate straight line is better obtained.

second embodiment

Next, a second embodiment of the present invention will be described. In the second embodiment, as the first state, a rest state indicating a standing position is a different part from the first embodiment. The other steps and the structure of the living body measurement device 10 used for physical strength measurement are the same as those of the first embodiment. Therefore, a detailed description of the same configuration as that of the living body measurement device 10 of the first embodiment will be omitted. In addition, as the first state, it is of course possible to adopt a rest state other than the standing position, for example, a state of lying down or a state of sitting on a chair.

FIG. 6 is a program flowchart showing the flow of physical strength measurement according to the second embodiment of the present invention. In the example shown in FIG. 6, the implementation of three given states is instructed to the measurement object, and the physical strength is measured based on the pulse rate and energy consumption of each given state. The quantity can be 2 or more than 4.

The pulse sensor 50 is attached to a predetermined position (for example, the earlobe) of the measurement subject, and the pulse measurement is started (step S200). The pulse measurement is started when a predetermined operation is performed on the operation unit 21 (by pressing a start button, etc.) by the measurement subject. The control unit 40 causes the pulse sensor 50 to start pulse measurement, and also causes the timer unit 34 to start measuring the elapsed time. While performing a given state (until step S212), pulse measurement continues.

Next, the control unit 40 instructs the measurement subject to maintain the quiet state as the first state (for example, standing still, standing still), and the measurement subject implements the quiet state (step S201 ). The control unit 40 operates the calculation unit 32 at regular intervals (for example, 20 seconds) according to the detection result of the measurement object based on the acceleration sensor 31 in a resting state or the basal metabolic rate calculated from the input body information such as age, sex, and weight. The energy consumption is calculated and stored in the storage unit 33 .

The control unit 40 judges whether or not a predetermined implementation time has elapsed from the start of the quiet state (first state) (step S202). When a predetermined implementation time has elapsed from the start of the resting state (the first state) (Yes in step S202), the control unit 40 instructs the end of the implementation of the first state, and instructs the measurement object to be "walking" as the second state ( Step S204). That is, the second state is an active state with a higher load than the first state.

When the predetermined implementation time has not elapsed from the start of the quiet state (first state) (No in step S202), the control unit 40 determines whether it is a stable detection state (step S203). The determination of whether it is a stable detection state may be performed within the implementation time of continuing the implementation of the first state by judging whether the change in the pulse rate of the measurement object in the first state is detected within a predetermined range.

When the control unit 40 determines that the detection state is stable (YES in step S203), it instructs the end of the first state before the predetermined execution time elapses, and proceeds to step S204. And when it is judged that it is not the stable detection state (No in step S203), the control unit 40 makes the measurement object continue the current first state (walking slowly) (step S201), and repeats the processing from step S202 to step S203 in the same manner as above. .

Like this, if start from quiet state (first state), just become stable detection state before passing through given implementation time (for example 4 minutes), finish the first state and instruct to transfer to the second state, can realize the second state that instructs to carry out The shortening of the time in one state reduces the burden on the measurement object.

When the control unit 40 instructs the measurement subject to walk (second state) (step S204), the measurement subject walks according to the instruction (step S205). During this walking process, the control unit 40 causes the calculation unit 32 to calculate and store the consumed energy in the storage unit 33 at regular intervals in accordance with the detection result by the acceleration sensor 31 when the measurement subject is walking.

The control unit 40 judges whether or not a predetermined implementation time has elapsed since the start of walking (second state) (step S205) (step S206).

From the start of walking (second state) (step S205), when a predetermined execution time has elapsed (Yes in step S206), the process proceeds to step S208. On the other hand, when the predetermined implementation time has not elapsed since the start of walking (second state) (NO in step S206), the control unit 40 determines whether it is a stable detection state (step S207). The determination of the stable detection state can be performed in the same manner as step S203.

When the control unit 40 determines that the detection state is stable (YES in step S207), it instructs the end of the second state before the predetermined implementation time elapses, and proceeds to step S208. And when it is judged not to be in the stable detection state (No in step S207), the control unit 40 makes the measurement object continue to the current second state (walking) (step S205), and repeats the processing from step S206 to step S207 in the same manner as above.

When the control unit 40 instructs the measurement subject to run (third state) (step S208), the measurement subject runs according to the instruction (step S209). During running, the control unit 40 causes the calculation unit 32 to calculate and store the consumed energy in the storage unit 33 at regular intervals in accordance with the detection results of the measurement subject while running by the acceleration sensor 31 .

The control unit 40 judges whether or not a predetermined execution time has elapsed since the start of running (third state) (see step S209) (step S210). When a predetermined execution time elapses from the start of running (third state) (YES in step S210), the control unit 40 ends the pulse measurement (step S212).

When the predetermined implementation time has not elapsed since the start of running (third state) (No in step S210), the control unit 40 determines whether it is in the stable detection state (step S211). The determination of the stable detection state is preferably performed in the same manner as step S203.

When the control unit 40 determines that the detection state is stable (YES in step S211 ), it instructs the completion of the implementation of the third state before the predetermined implementation time elapses, and ends the pulse measurement (step S212 ). On the other hand, if it is determined that the detection state is not stable (No in step S211), the control unit 40 keeps the measurement object in the current third state (step S209), and repeats the processing from step S210 to step S211 in the same manner as above.

After the pulse measurement is completed (step S212), the control unit 40 generates an approximate straight line based on the pulse rate and energy consumption acquired respectively in the first state, the second state, and the third state (step S213). The generation of the approximate straight line corresponds to determination from the relational expression between the measured pulse rate and the consumed energy. The method of generating the approximate straight line is the same as that of the first embodiment.

After the approximate straight line is generated, the control unit 40 judges whether any pulse rate in the first, second, and third states has risen to 75% of the maximum heart rate (pulse rate) (step S214). When any of the pulse rates in the first, second and third states rises to 75% of the maximum heart rate (pulse rate) (Yes in step S214), the control unit 40 VO ₂ (HRmax) is estimated from the measured energy consumption (EE(75%HRmax)) at 75% of the time (step S215).

When any of the pulse rates in the first, second, and third states has not risen to 75% of the maximum heart rate (pulse rate) (No in step S214), the control unit 40 Estimate energy consumption (EE (75% HRmax)) when the heart rate (pulse rate) is 75% of the maximum heart rate (pulse rate), and estimate (calculate) VO ₂ (HRmax) from the energy consumption (EE (75% HRmax)) ) (step S216).

The control unit 40 determines the physical strength of the measurement subject from the VO ₂ (HRmax) estimated (calculated) in step S215 or step S216 (step S217).

According to the second embodiment, since the first state is indicated as the rest state, it is possible to perform physical strength determination with a light load on the measurement object. In addition, other structures, functions, and effects are the same as those of the first embodiment.

third embodiment

Next, a third embodiment of the present invention will be described. In the third embodiment, instructing the implementation of an active state of the same content as a given state for a given time to continue, the control unit 40 as the biological information calculation unit performs the measurement based on the given state that is measured multiple times in the given time. The pulse rate and energy consumption of the subject are approximated by a straight line, and a relational expression of energy consumption for a given pulse rate of the measurement subject is determined. That is, the difference from the first embodiment or the embodiment is that a given state continues for a given time and indicates the implementation of an active state, and the relational expression is determined from a plurality of measurement points acquired within the given time .

7 is a program flow chart showing the flow of physical strength measurement according to the third embodiment of the present invention, and FIG. 8 is a graph showing the relationship between the pulse rate and the consumed energy, which depicts the pulse rate and consumed energy measured multiple times within a given period of time. .

The pulse sensor 50 is attached to a predetermined position (for example, the earlobe) of the measurement subject, and the pulse measurement is started (step S300). Pulse measurement is started when the subject of measurement performs a given operation on the operation unit 21 (presses a start button, etc.). The control unit 40 causes the pulse sensor 50 to start pulse measurement, and also causes the timer unit 34 to start measuring the elapsed time. While performing a given state (until step S305), pulse measurement continues.

Next, the control unit 40 instructs the measurement subject to walk as a predetermined state, and the measurement subject walks (step S301 ).

The control unit 40 judges whether or not a predetermined time interval has elapsed from the start of walking (step S302). The given time interval may be, for example, 1 minute, or may be set to another time.

When the predetermined time interval has not elapsed since the start of walking (NO in step S302), the control unit 40 causes the measurement subject to continue walking in a predetermined state (step S301).

From the start of walking, when a given time interval has elapsed (Yes in step S302), the control unit 40 causes the calculation unit 32 to calculate the given time interval according to the detection result of the acceleration sensor 31 at the given time interval. The energy consumption at intervals is stored in the storage unit 33 (step S303).

Next, the control unit 40 judges whether or not a predetermined time has elapsed since the first walk (step S304). The given time may be, for example, 10 minutes, but may be set to another time.

When the time from the first start of walking is less than the predetermined time (NO in step S304), the processing from step S301 to step S303 is repeated. Accordingly, the pulse rate and energy consumption of the measurement subject in a given state can be measured every time the given time interval (1 minute) elapses during a given time (10 minutes). In addition, the measurement in the given time (10 minutes) is not necessarily limited to the same time interval, and any number of measurements can be performed in the given time (10 minutes).

When the control unit 40 judges that the time from the first start of walking has reached the predetermined time (YES in step S304), it instructs that the implementation of the predetermined state is completed and ends the pulse measurement (step S305).

After the pulse measurement is completed (step S305), the control unit 40 generates an approximate straight line from the pulse rate and energy consumption of the measurement subject in a given state measured multiple times in a given time (step S306, FIG. 8). The generation of this approximate straight line corresponds to determination from the relational expression between the measured pulse rate and the consumed energy. In FIG. 8 , each point corresponding to 10 measurement points and an approximate straight line L31 generated from these measurement points are shown. Even if the implementation of the same given state (walking) continues for a given time (10 minutes), the pulse rate gradually rises, so the pulse rate measured within a given time (10 minutes) can be obtained in a dispersed state as shown in Figure 8. Multiple measurement points. Based on these measurement points, the approximate straight line L31 is obtained in the same manner as the method of generating the approximate straight line in the first embodiment.

The control unit 40 estimates VO ₂ (HRmax) from the approximate straight line generated in step S306 as in the first embodiment (step S307), and determines the physical strength of the measurement target from VO ₂ (HRmax) (step S308). Physical strength judgment is the same as that of the first embodiment.

According to the third embodiment, if the execution of a given state is instructed, the measurement subject can perform the physical strength judgment by continuing the execution of the predetermined state for a predetermined time, so that extremely simple physical strength judgment can be realized. In addition, other structures, functions, and effects are the same as those of the first embodiment.

Fourth Embodiment

Next, a fourth embodiment of the present invention will be described. In the fourth embodiment, as in the above-mentioned first to third embodiments (including modifications), the relational expression of the energy consumption for a given pulse of the measurement object is determined, and the consumption of the measurement object is calculated using the relational expression. Energy (body information).

The calculation unit 32 determines the relationship between the pulse and the consumed energy (the relational expression of the consumed energy for a given pulse rate) based on the measurement by the pulse sensor 50 and the measurement by the consumed energy measuring unit. Steps S100 to S115 in FIG. 2 related to the first embodiment, steps S200 to S213 in FIG. 6 related to the second embodiment, and steps S300 to S307 in FIG. 7 related to the third embodiment can be used. An arbitrary method determines a relational expression of energy consumption for a given pulse rate of a subject to be measured. There is a high correlation between pulse rate and energy expenditure. Therefore, after obtaining the approximate straight line L11 shown in FIG. 3 and the approximate straight line L31 shown in FIG. By applying this pulse rate to the relational expression (approximate straight line), the consumed energy consumed at this time can be easily calculated. Therefore, it is not necessary to perform calculation of the consumed energy by detecting the body motion of the measurement object with the acceleration sensor. Therefore, the conventional method of using the acceleration sensor to obtain the acceleration value of the body movement to calculate the energy consumption cannot accurately calculate the active state. energy. In addition, since the pulse sensor 50 and the acceleration sensor 31 are combined, the energy consumption can be obtained as described above from the pulse rate when performing pulse measurement based on the pulse sensor 50, and when the pulse measurement based on the pulse sensor 50 is not performed, energy consumption can be obtained as described above. In this way, the consumed energy is obtained from the acceleration value of the body movement.

Although the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments, and improvements or changes can be made within the purpose of improvement or the scope of the idea of the present invention.

Industrial Applicability

The living body measuring device and method for measuring physical strength of the present invention are suitable for the simple measurement of physical strength and confirmation of health status.

Claims (8)

1. a body determinator, is characterized in that, this body determinator comprises:

Instruction unit, this instruction unit is indicated the enforcement of given active state to determination object;

Pulse transducer, this pulse transducer is measured the Pulse Rate of described given active state;

Consumed energy determination part, this consumed energy determination part is measured the consumed energy of described given active state;

Body information calculating part, the described consumed energy that described in when this body information calculating part basis Pulse Rate that described pulse transducer is measured under described given active state and this Pulse Rate, consumed energy determination part is measured is determined the catabiotic relational expression for the given Pulse Rate of described determination object, according to this relational expression, calculate the body information of described determination object;

Described instruction unit is indicated the enforcement as the third state of the second state of the first state of described given active state, the active state larger than this first state load, the active state larger than this second state load at least successively, and described body information calculating part obtains near linear definite described relational expression according to the Pulse Rate of the described determination object of the Pulse Rate of the described determination object of the Pulse Rate of the described determination object of described the first state and consumed energy, described the second state and consumed energy, the described third state and at catabiotic 3;

The difference of the Pulse Rate of the described determination object of the Pulse Rate of the described determination object of described the first state and described the second state is below given threshold value time, and compared with the active state of instruction, the larger active state of load is indicated as the described third state when larger than described given threshold value with described difference.

2. body determinator according to claim 1, it is characterized in that: this body determinator also comprises can input the age, sex, body weight of described determination object, data input part part except fatty body weight, described consumed energy determination part comprises the acceleration transducer that can detect the accekeration of the body kinematics of described determination object, calculates described consumed energy according to the accekeration of the described body kinematics being detected by this acceleration transducer with by age of described data input part part input, sex, body weight, except fatty weighing machine.

3. body determinator according to claim 2, it is characterized in that: described instruction unit by the input of described data input part part except the given reference value of fatty weight ratio is when larger, using with described except fatty body weight be that load is larger compared with the active state of described given reference value instruction when following active state is as described the second state and/or the instruction of the described third state.

4. body determinator according to claim 1, it is characterized in that: within the enforcement time of enforcement of continuing described given active state, the variation of Pulse Rate that the described determination object of described given active state detected is in given range time, described instruction unit is indicating the enforcement of described given active state to finish through before the described enforcement time, while not detecting, described instruction unit indicates the enforcement of described given active state to finish after the process described enforcement time.

5. body determinator according to claim 1, it is characterized in that: described instruction unit instruction continues to carry out the enforcement of the active state of same content preset time as described given active state, described body information calculating part obtains near linear and determines described relational expression according to the Pulse Rate of the described determination object of the multiple described given active state of measuring in described preset time and consumed energy.

6. body determinator according to claim 1, it is characterized in that: described body information calculating part is for described body information, calculate the EE(75%HRmax of described determination object according to described relational expression), and by this EE(75%HRmax) be applied to represent EE(75%HRmax) and VO ₂(HRmax), in the expression formula of dependency, calculate the VO of described determination object ₂(HRmax).

7. body determinator according to claim 6, is characterized in that: described body information calculating part is according to the described VO of described determination object ₂(HRmax) sex and the age of value and described determination object, carry out judging and showing result of determination in display unit about the muscle power of described determination object.

8. body determinator according to claim 1, it is characterized in that: described body information calculating part is for described body information, the Pulse Rate of the described determination object that described pulse transducer is obtained is applied to described relational expression, calculates the consumed energy corresponding with described Pulse Rate.